Thistle-pulling machine



H. F. HOEHNE. TH ISTLE PULLING MACHINE.

APPLICATION FILED MAR.27' 1919.

Patented Mar. 21, 1922.

2 SHEETS-SHEET 1- H. F. HOEHNE. THISTLE PULLING MACHINE.

APPLICATION FILED MAR. 27. I919- Patented Mar. 21, 1922.

2 SHEETS-SHEET Z- I I wwuw 1 0mm I 644W UNITED STATES HERMAN F. HOEHNE, OIF KAUKAUNA, WISCONSIN.

THISTLE-IPULLIN G MACHINE.

Specification of Letters Patent.

Patented. Mar. 21, 1922.

Application filed March 27, 1919. Serial No. 285,575.

To all whom it may concern:

Be it known that I, HERMAN F. HOEHNE, citizen of the United States, residing at Kaukarma, in the county of Outagamie and State of Wisconsin, have invented certain vnew and useful Improvements in Thistle- Pulling Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in thistle pulling machines of the general type disclosed by United States Patent No. 1,186,206 of April 20th, 1915. With machines of this character, considerable difficulty has been encountered by breakage of the springs which return the comb cleaners after actuation thereof, and the operating means for the combs produce a Very disagreeable noise. My invention, therefore, has for one object to overcome these difiiculties by the provision of cams for moving thecomb cleaners in both directions, so that the springs Will be eliminated and the device will operate practically without noise.

A further object is to provide in a single casting, a bearing for the transverse comb carrying shaft, a bracket for attaching such bearing to the frame of the machine,,and a cam arrangement for operating the comb cleaners.

Difficulty has also been experienced in retaining the cleaners in proper contact with the -o1nbs, and a further object of my inven tion is to provide foreffectively adjusting said cleaners to retain them in proper contact with the comb teeth.

With the foregoing in view, the invention resides in the novel features of construction and. unique association of parts hereinafter fully described and claimed, reference being made to the accompanying drawings which form a part of this application.

Figude l is a partial top plan view of the machine embodying the improved features of construction.

Figure 2 is a longitudinal section on the plane indicated by the line 2-2 of Figure 1.

Figure 3 is an additional longitudinal sectional view on the plane indicated by the line 3-3 of Figure 1.

Figure 4 is a vertical transverse section on the plane of the line H of Figure 3.

Figure 5 is a perspective view of one of the castings above referred to.

' Figure 6 is a perspective of the cover plate for the casting seen in Figure 5. 1

Figure 7 is a perspective view showing the manner of adjusting the comb cleaners.

In the drawings above briefly described, the numeral 1 designates the frame of a thistle pulling machine such as that disclosed in the patent above referred to, said frame being mounted upon a wheeled axle 2 which, by means of suitable driving connections 3, rotates a transverse shaft 4. This shaft carries a plurality of preferably cast, interchangeable spiders each having a suitable number of radial arms 5, the outer ends of these arms carrying channel bars or the like 6 to which the thistle pulling combs 7 are secured. Cleaners 8 are provided for the combs 7 and each of these cleaners is by preference formed of an angle iron bar having its flanges bent together at the ends of the bar to provide lugs 9 having openings through which the threaded outer ends 10, of substantially radial levers 11, project. Nuts 12 are threaded on the ends 10in contact with the inner and outer sides of the lugs 9 and by adjusting said nuts, the, cleaners 8 may be properly set with respect to the combs 7 for most effectively cleaning the latter. The levers 11 are fulcrumed between their ends at 13 to projecting lugs 14: on the arms 5 and each arm is preferably provided with two of such lugs in order that the spiders carrying said arms may be interchangeably used at opposite sides of the machine. The inner ends of the levers 11 are provided with laterally extending shoes which are preferably in the form of rollers 15.

For rotatably mounting the shaft 4 and providing cams for engagement with the rollers 15, for the purpose of operating the levers 11 to move the cleaners 8 along the teeth of the combs 7, I provide a pair of castings C which are identical in construction with the exception that one is adapted only for application to the left side of the machine, while the other is applicable to the right hand side thereof. The construction and arrangement of the castings C is shown most clearly in Figures 3, 4 and 5. Each casting includes a substantially oval, vertical plate 16 having a bearing 17 formed integrally with one of its sides, and an attaching bracket 18 likewise formed integrally with said side, the bearing and bracket being also integrally joined to each other. On its opposite side, the plate 16 is provided with a substantially ovate, eccentrio hub 19 and with at-continuous fiangeEZO spaced around said hub to provide a continuous channelQl in which the rollers 15 travel, The bracket 18 is secured by bolts or t lie like 22 to the "frame 1 and it will be seen that each casting forms a bearing for the shaft 4 as well as provldmg cam means for operating the cleaners. 8;

To 7 prevent, any. possibility of'the' rollers 15 n ovingplaterally from the channel 21 and also-to assistin excluding dirt, weeds,

etc, iiromsaidchannel, a cover plate'23 is provided for each casting C, said cover plate being spacedsifromthe edge of the flange 20 a siifiicieuti" distance to accommodate the levers :11; This spacing: is preferably accomplishedby bossestile formed integrally with the hub 19,- and screws or the like 25 are passed thr'oughthe plate 23 into said bosses to secure the former 1n place.

Bv providing the cam means afforded by the bosses 119 andtheflanges for operatinglevers 11,3the -ar11ai1gemenl; commonly used may be eliminated with the result that no trouble is experienced from noise, spring breakage, etc. Furthermore, mu h better resultsareobtamedwhen means such as the leverends 1O andthe nuts*12 are providedfor adjustingathe cleaners 8 'with'respect to the: combs Since excellent results have been obtained*inactual use of the machine, from the details hereindisclosed, such details are preferablyfollowed, but within the scopjeoi the inventionas claimed, conside'r-- able latitude; is allowed for making numerone minor changes, 7 i

I claim 1 1. In a thistle pulling machine, a wheeled frame, ap'air of vertical plateseachliaving a bearing on one side and an integral attachingbracket on such; side, said brackets being'secured to thesides of said frame, the

otherside of each plate having an integral eccentric hub and a continuous, integral flange around said. hub, a transverse, driven shai't rotatably received in said bearings,

radialarms carried by said shaft, combs on said arms, cleaners for said combs, levers fulcrumed to said arms and carrying said cleaners,and laterally extending" shoes on integral with. one of-its sides and also liavmg an attaching bracket integral with said side, the other side of said plate having-jail eccentric hub and" a around the same;

a. A structure as specified in claim 3'; to

gether with ib'osses on the ends ofsaid hub, a second plate spaced outwardly fromsaid flange by said bosses, and fasteners securing said second plate and bosses together.

5. In athistle pulling machine, a wheeled frame, a transverse driven'shatt mounted on said frame and having radiatlng arms provided at their outer ends with combs,

cleaners for said combs, substantially radial levers fulcrumed between thGH GIKlStOSELlCl arms and carryingsaid cleaners, said levers having threaded outer ends passinglthrough the ends of said cleaners," adjusting nuts threaded on said lever ends and bea-rin against the inner and outer sides" of said cleaners, and, means for operatingsa-id levers to move said cleaners along said combs;

lntestimonywhereof I have hereunto: set my hand.

HER-MAN F; HOEHNE.

continuous flange 

